15. Convective storms

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15. Convective storms

The Atmosphere, the Ocean and Environmental Change (GG 140) There are three main types of convective storms: airmass thunderstorms, severe thunderstorms and hurricanes. These storms are all driven by the release of latent heat into the atmosphere during condensation of water vapor. Severe thunderstorms include both squall line thunderstorms and tornados. They acquire energy from water vapor in the atmosphere over land and therefore typically require warm air temperatures and high humidity. Hurricanes gain energy from water vapor evaporated from the ocean surface. This requires warm ocean temperatures, and is the reason hurricanes weaken over land. Hurricanes are cyclonic and therefore also require a non-zero Coriolis force to form and maintain their structure. For this reason they cannot form over the equator and cannot cross the equator. 00:00 - Chapter 1. Coriolis Force Sign Reversal 01:17 - Chapter 2. Convective Storms 02:52 - Chapter 3. Airmass Thunderstorms 04:25 - Chapter 4. Severe Thunderstorms 16:35 - Chapter 5. Tornados 26:37 - Chapter 6. Hurricanes Complete course materials are available at the Open Yale Courses website: http://oyc.yale.edu This course was recorded in Fall 2011.

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